Article History
Received: 13 July 2018
Accepted: 6 May 2020
First Online: 24 May 2020
Ethics approval and consent to participate
: Not applicable
: Not applicable
: KE and LD declare that they have no competing interests. JH is a member of the Board of Directors for the Busara Center for Behavioral Economics (Nairobi, Kenya) and the Board of the charity ’Arm in Arm’ (Princeton, NJ), but does not receive financial compensation from either organization.